TW202138657A - Pressure-regulating device and drainpipe structure - Google Patents

Abstract

A pressure-regulating device is formed of a resilient material and has a resilient expandable body 68, which has two openings and is capable of expansion and contraction, and a vent valve 110, which is connected to one of the openings of the resilient expandable body 68 and which performs ventilation between a cylinder exterior and external air.

Description

Pressure adjustment device and drainage pipe structure

The disclosure relates to a pressure adjusting device and a drainage pipe structure.

Japanese Patent Application Publication No. 2018-105035 has disclosed a drainage pipe structure equipped with a pressure relief device and a ventilation mechanism.

Since this drainage pipe structure is equipped with a pressure relief device and a ventilation mechanism, the pressure relief device can suppress the positive pressure of the drainage pipe and the ventilation mechanism can suppress the negative pressure of the drainage pipe. However, the pressure relief device and the venting mechanism are separately installed, so there is still room for improvement in terms of adjusting both the positive pressure and the negative pressure while being configured into a simplified shape.

The present disclosure takes the above facts into consideration, and its purpose is to provide a pressure adjusting device and a drainage pipe structure that can adjust both the positive pressure and the negative pressure while simultaneously miniaturizing the drainage pipe structure.

The pressure adjusting device of the first form has: an expandable cylinder formed of an elastic material and having two openings; and a vent connected to the opening on one side of the cylinder, and Ventilation is performed between the inside of the cylinder and the outside air.

In the pressure adjusting device of the first aspect, as an example, the opening on the other side of the cylindrical body can be connected to the drainage pipe on the downstream side of the trap. In the first form of pressure adjustment device, it can be Connect the cylinder that suppresses positive pressure to the vent that suppresses negative pressure, and then install the cylinder with the vent connected to a part of the drainage pipe. Therefore, it is compared to installing the vent and cylinder on the drainage pipe. Different parts of the situation can make the structure of the drainage pipe miniaturized.

As an example, when the pressure in the drainage piping on the downstream side of the trap is higher than the external air pressure, in other words, when it becomes a positive pressure, the diameter of the cylinder provided on the downstream side of the trap is enlarged, in other words In other words, expansion can reduce the positive pressure acting on one side of the trap. Thereby, it is possible to prevent the sealing water of the trap from spraying to the upstream side, in other words, the breaking of the trap caused by the positive pressure.

On the other hand, when the pressure in the drain piping on the downstream side of the trap is lower than the external air pressure, in other words, when the pressure becomes negative, external air will flow in from the ventilation mechanism provided on the downstream side of the trap, and External air flows through the cylinder into the drainage pipe on the downstream side of the trap. In this way, the negative pressure acting on the side of the trap can be reduced, and the sealing water of the trap can be prevented from being sucked to the downstream side, in other words, the breaking of the trap caused by the negative pressure.

The pressure adjusting device of the second aspect is the pressure adjusting device of the first aspect. It has: an outlet cover installed on the cylinder to cover the opening on one side, and the vent is installed, and the A first communication hole through which the cylinder body communicates with the vent; an inlet cover is installed on the cylinder body to cover the opening on the other side, and is provided with a second communication hole that allows the drain pipe to communicate with the cylinder body ; And the body cover is installed on the inlet cover and the outlet cover, and will surround the cylinder.

In the pressure adjusting device of the second aspect, the outlet cover attached to one side of the cylinder body formed of an elastic material and the inlet cap attached to the other side of the cylinder body are attached to the main body cover. As an example, when the pressure adjusting device is arranged such that the outlet cover with the vent is arranged above the inlet cover, the weight of the vent can be supported by the inlet cover through the outlet cover and the main body cover. That is, since the weight of the vent is not transmitted to the cylinder, the cylinder can be expanded and contracted without being deformed.

The pressure adjusting device of the third aspect is the pressure adjusting device of the second aspect, so that the main body cover supports the inlet cover and the outlet cover from a direction intersecting the axial direction.

In the pressure adjusting device of the third aspect, since the main body cover supports the inlet cover and the outlet cover from the direction intersecting the axial direction, even if positive pressure and negative pressure are applied to the cylinder formed of the elastic material, the cylinder can be restrained.的axial deformation. Therefore, even if the pressure change action is applied to the cylinder, it can be suppressed to prevent the pressure adjusting device from moving in the axial direction.

The pressure adjusting device of the fourth form is in the pressure adjusting device of the third form, and the inner peripheral surface of the main body cover is provided with a support which is engaged with the inlet cover and the outlet cover to support the inlet cover and the outlet cover Department.

In the pressure adjusting device of the fourth aspect, by engaging the inlet cover and outlet cover with the support part provided on the inner peripheral surface of the main body cover, the inlet cover and outlet cover are supported by the main body cover. Therefore, even if the pressure changes The cylinders attached to the inlet cap and outlet cap can also be restrained so that the pressure adjusting device does not move in the axial direction.

The pressure adjusting device of the fifth form is in any pressure adjusting device of the second form to the fourth form, so that the inlet cover and the main body cover can be relatively rotated; the outlet cover and the main body cover are prevented from rotating relative to each other The fixed part is prevented from rotating relative to each other.

In the pressure adjusting device of the fifth form, the inlet cover and the main body cover are relatively rotatable, and the outlet cover and the main body cover are prevented from rotating relative to each other by a fixing part that prevents relative rotation. Therefore, the cylinder body cannot rotate relatively. It is integrally connected to the outlet cover and the main body cover, and the inlet cover installed on the cylinder body can rotate relative to the main body cover.

Therefore, the inlet cover, the outlet cover, the main body cover, and the cylinder body can be integrated without twisting the cylinder body during assembly.

In addition, as an example, when the vent mechanism is twisted into the outlet cover for installation, as long as the body cover that cannot be rotated relative to the outlet cover is held in advance, the vent mechanism can be twisted in without rotating the outlet cover, which can lift Assembly workability.

The pressure adjusting device of the sixth form is the pressure adjusting device of the first form. The cylinder is provided with a first space communicating with the opening on one side and the opening on the other side, and the The first space communicates with a plurality of second spaces extending in the radial direction and the axial direction of the cylinder; viewed from the direction intersecting the axis of the cylinder, the maximum width of the first space is set to be larger than that of the second The maximum width of the space should be large.

In the pressure adjusting device of the sixth form, when the inside of the cylinder becomes negative pressure, the cylinder as a whole shrinks in diameter, and the wall surfaces of the cylinder forming the second space are in close contact with each other, and it is considered that the second space may be eliminated. However, since the maximum width of the first space connecting the opening on one side of the cylinder and the opening on the other side is set to be larger than the maximum width of the second space, even the second space is affected by negative pressure. In the case of elimination, although the width of the first space will be narrowed, it will not be eliminated.

Therefore, even when the pressure is negative, the opening on one side of the cylinder and the opening on the other side will pass through the first space to maintain a communication state, allowing the outside air introduced from the vent to pass through the first space to the drain piping side Import.

The pressure adjusting device of the seventh aspect is the pressure adjusting device of the first aspect. The cylinder has a base that extends in the radial direction and is formed with the opening, and a base that is erected on the base and faces the cylinder. The wall portion extending in the axial and radial directions to partition the second space; the base portion and at least the portion on the axis side of the wall portion are connected through an inclined surface inclined with respect to the base portion.

In the pressure adjusting device of the seventh aspect, by connecting at least the part on the axis side of the wall that divides the second space and the base through an inclined surface, compared to adding the wall and the base at a right angle In the case of connection, the connecting part of the wall part and the base part will be more easily deformed, whereby the entire cylinder body will be more easily expanded in diameter, and the positive pressure will be more easily absorbed.

The pressure adjusting device of the eighth aspect is the pressure adjusting device of the first aspect. A float valve is provided between the cylinder and the vent disposed on the upper side of the cylinder, and the float valve is configured to include a valve seat And the valve body that will be separated from the bottom of the valve seat and arranged to float on the water.

In the pressure adjustment device of the eighth form, if the drain from the downstream side rises inside the cylinder, the float valve will float on the drain and be attached to the valve seat, which will block the float valve and the valve seat. Therefore, it can prevent the drainage of water from penetrating into the vent. Thereby, it is possible to prevent the reverse flow of drainage from flowing out to the outside through the vent.

In addition, in a state where the drainage does not penetrate into the cylinder, the floating raft is separated from below the valve seat, so that the external air introduced from the vent can pass through the gap between the valve seat and the float valve to the drainage pipe.

The drain pipe structure of the ninth form has: a pipe catcher, which is provided with an inflow portion that causes the inflowed drainage to flow downward, is provided below the inflow portion, and descends from the upper side of the vertical direction to the horizontal direction The curved first lower curved pipe portion, the first upper curved pipe portion that is provided on the downstream side of the first lower curved pipe portion in the drainage direction and that bends upward from the horizontal direction to the vertical direction, is provided on the first lower curved pipe portion. On the downstream side of the upper curved pipe portion in the drainage direction, the second upper curved pipe portion that bends upward from the lower side in the vertical direction toward the horizontal direction, and the second upper curved pipe portion provided on the downstream side of the drainage direction of the second upper curved pipe portion, and will be A second lower bending pipe portion that is bent downward in the horizontal direction to the lower side of the vertical direction; and the pressure adjusting device of the first form is installed on the upper part of the second lower bending pipe portion.

In the pipe trap of the drain pipe structure of the ninth form, when the drain water flows into the inflow portion, the drain water passes through the first lower curved pipe portion, the first upper curved pipe portion, the second upper curved pipe portion, and the second Bend down The pipe portion is discharged downstream, and the bent portion formed by the first lower bending pipe portion, the first upper bending pipe portion and the second upper bending pipe portion will accumulate drainage, and the accumulated drainage will become a seal. water.

The second lower bending pipe portion is bent downward from the horizontal direction to the lower side in the vertical direction, so the flow direction of the drainage gradually changes downwards and suppresses the upward flow of the drainage.

Therefore, by installing the pressure adjusting device on the upper part of the second lower bend pipe, it is difficult for the drainage to flow back to the pressure adjusting device, which can prevent the drainage from flowing into the cylinder and suppress the reduction in the capacity of the pressure adjusting device.

As explained above, according to the pressure adjusting device and the drainage pipe structure of the present disclosure, both the positive pressure and the negative pressure can be adjusted, and the drainage pipe structure can be miniaturized at the same time.

1: The first drainage system

2: 2nd drainage system

10: Drainage pipe structure

12: Floor

14: Floor

16: flow management station

16A: Drain

18: dishwasher

20: Remnant food processor

22: Piping

22CL: axis

24: Tube catcher

26: Piping

28: Confluence connector

30: siphon drain

30A: Horizontal tube

30B: Standpipe

32: Longitudinal hole

34: Drain standpipe

36: Inflow side piping connection part

36A: Male thread

36B: Segment

36CL: axis

36T: upper end

38: The first bending tube

38A: The first lower bend pipe

38ACL: axis

38B: The first upper bend pipe

38UF: inner peripheral surface of the upper side of the pipe

40: Plumb Pipe Department

40CL: axis

42: The second bending pipe part

42A: The second upper bending tube

42B: The second lower bend pipe

42CL: axis

44: Reduced diameter pipe

46: Discharge side piping connection part

46A: Segment

46B: Male thread

48A: Female thread

52: cleaning mouth

52A: Male thread

54: Lid

54A: Female thread

56: Pressure relief device installation department

56A: Male thread

57: Nut

57A: Female thread

58: Rectifying member

58A: Tube

64: Nut

64A: Female thread

65: Pressure adjustment device

66: Pressure Relief Device

68: Elastic expansion and contraction body

68A: Expansion part

68B: Base

68C: Installation Department

68D: Ribs

70: Lower support member

72: Upper support member

74: outer cover

78: ring groove

80: Through hole

82: Insert the tube

84: Through hole

86: Check valve installation department

86A: Male thread

90: check valve

92: body

92A: Female thread

92B: Male thread

94: valve body

96: Lid

96A: Female thread

98: Partition Wall

100: Valve body support

102: Through hole

104: Valve seat

106: valve hole

110: Vent valve

112: Valve body

112A: Large diameter part

112B: Small diameter part

120: Pressure Relief Device

122: ring

124: support member

202: Primary drainage trap

203: Secondary drainage trap

204: Temporary Storage

204A: Entrance

204B: Exit

206: Pressure reduction piping

206A: Turn-back section

206B: Turn-back section

206C: Exit

208: Ascendant

208A: Downstream

208B: lowest part

208C: Upstream

208D: the uppermost part

208E: Top part

210: Piping

212: Piping

214: body part

216: upper body

216A: Large diameter part

216B: Large diameter part

216C: Small diameter part

216D: Opening

218: lower body

218A: Large diameter part

218B: Inside

220: cover member

222: Entrance

224: Export

226: Winding part

226A: Curved part

226B: Turnback Department

226C: Curved part

226D: Curved part

226E: Curved part

228: Large Diameter

230: small diameter part

232: entrance

234: Exit

236: Branch Pipeline

238: Entrance

240: export

242: Drain

300: Rectifying component

300A: Tube

300B: Tab

300C: flange

302: Opening

304: link part

306: Rib

400: pressure relief device

412: Valve body

412A: Ring recess

468: Elastic expansion and contraction body

468A: Expansion part

468B: Base

468C: Installation Department

468D: Ribs

470: Lower support member

472: Upper support member

472A: protrusion

474: outer cover

474A: The first half-component

474Aa: arc wall

474Ab: flange

474Ac: flange

474Ad: snap hole

474Ae: Claw member

474Af: Slot

474B: The second half-component

474Ba: arc wall

474Bb: flange

474Bd: snap hole

474Be: Claw member

474Bf: Slot

478: Ring Groove

480: Through hole

482: Insert the tube

486: Check valve installation part

486A: Male thread

488: expansion and contraction film

488A: Wall

488B: connecting wall

488C: arc wall

490: corner part

492: face up

496: mounting ring

502: rib

504: Valve body support

506: hole

508: Valve seat

508A: Valve hole

510: Fitting hole

A: interval

B: diameter

D1~D8: inner diameter

FC: Inscribed circle

FL: imaginary line

h: sealing water depth

H1: Sealing water height

H2: head pressure

L1~L4: tangent

R1~R3: radius of curvature

La: horizontal distance

Lb: Horizontal distance

Pt: the top end

P’t: The top end

Pu: the bottom

P’u: the bottom

S: Space

S1: Through space

S2: Space

S3: gap

S4: Clearance

Ws: liquid level

X1~X2: axis

Z: axis

FIG. 1 is a cross-sectional view of a part of a building to which a drainage pipe structure according to an embodiment of the present disclosure is applicable.

Fig. 2 is a side view showing the pipe trap used in the drainage pipe structure of the present disclosure.

Fig. 3A is a cross-sectional view along the axis of the tube trap shown in Fig. 2.

Figure 3B is a cross-sectional view along the axis of the tube trap.

Fig. 4 is a cross-sectional view showing the pressure adjusting device.

Fig. 5 is a perspective view showing the pressure relief device partially broken away.

Figure 6 is a cross-sectional view showing the elastic expansion and contraction body of the pressure relief device.

Fig. 7 is a cross-sectional view showing a pressure relief device related to a modification.

Fig. 8 is a cross-sectional view showing a check valve related to a modification.

Fig. 9 is a cross-sectional view showing the temporary storage part, the pressure reducing pipe, and the ascending part.

Fig. 10 is a perspective view showing the temporary storage part.

Fig. 11 is a front view showing the temporary storage part.

Fig. 12 is a perspective view showing Modification 1 of the pressure reducing pipe.

Fig. 13 is a longitudinal sectional view showing Modification 1 of the pressure reducing pipe.

Fig. 14 is a cross-sectional view showing Modification 1 of the pressure reducing pipe.

Fig. 15 is a longitudinal sectional view showing Modification 2 of the pressure reducing pipe.

Fig. 16 is a longitudinal sectional view showing Modification 3 of the pressure reducing pipe.

Fig. 17 is a cross-sectional view schematically showing the function of the second drainage system in the drainage pipe structure.

Fig. 18 is a cross-sectional view schematically showing the functions of the temporary storage portion and the ascending portion.

Fig. 19 is a cross-sectional view showing a rectifying member related to the second modification.

Fig. 20 is a side view showing the rectifying member related to the second modification.

Fig. 21 is a bottom view showing the rectifying member related to the second modification.

Fig. 22 is a perspective view showing a pressure relief device related to the second modification.

Fig. 23 is a cross-sectional view along the axis of the pressure relief device related to the second modification.

Figure 24 is a perspective view showing the pressure relief device with the outer cover removed.

Fig. 25(A) is a perspective view showing the elastic expansion and contraction body, and (B) is a cross-sectional view along the axis of the elastic expansion and contraction body (the sectional view along the line 25(B)-25(B) of Fig. 25(A)).

Fig. 26(A) is a plan view of the elastic expansion and contraction body viewed from the axial direction, and (B) is a cross-sectional view at right angles to the axis of the elastic expansion and contraction body (Fig. 25(B) 26(B)-26(B)) (Line cross-sectional view), (C) is a cross-sectional view at right angles to the axis of the elastic expansion and contraction body in a negative pressure state.

Fig. 27 is a perspective view showing a cross-section of the elastic expansion and contraction body with the lower support member and the upper support member installed.

Fig. 28 is a perspective view showing the first half-member and the second half-member.

Fig. 29(A) is a perspective view showing the valve body in normal time, and (B) is a perspective view showing the valve body which floats by the drainage of the reverse flow and blocks the opening of the valve seat.

Hereinafter, the mode for implementing the present disclosure will be described based on the drawings. In Fig. 1, the drainage pipe structure 10 of this embodiment has a first drainage system 1, a second drainage system 2, a siphon drainage pipe 30, a pipe trap 24 as a first drainage trap, and a second drainage trap. The primary drainage trap 202, the temporary storage section 204, the pressure reduction pipe 206, and the rising section 208 of the collector.

The first drainage system 1 is a piping structure that allows drainage from a flow table 16 as an example of the first water appliance to flow. In addition, the second drainage system 2 is a piping structure that allows drainage from the dishwasher 18, which is an example of the second water appliance, to flow.

As shown in FIG. 1, a floor 14 is arranged on the floor 12 of the household at intervals, and a flow table 16 as a first water appliance and a dishwasher 18 as a second water appliance are arranged on the floor 14.

The waste food processing machine 20 is installed in the drainage port 16A of the flow processing table 16. A pipe 22, a water-sealed pipe trap 24, and a pipe 26 are connected to the downstream side in the drainage direction of the leftover food processor 20.

On the downstream side of the pipe 26 in the drainage direction, a confluence joint 28 and a siphon drainage pipe 30 are arranged. The structure of the siphon drain pipe 30 includes a horizontal pipe 30A and a vertical pipe 30B having the same inner diameter as the pipe 26.

The end of the pipe 26 on the downstream side in the drainage direction is a horizontal pipe 30A to which a siphon drainage pipe 30 is connected through a junction joint 28. In addition, a pipe 210 for discharging the drain water from the dishwasher 18 described later is connected to the manifold 28.

The horizontal pipe 30A is arranged on the floor 12, and the vertical pipe 30B of the siphon drainage pipe 30 hangs down through the longitudinal hole 32 formed in the floor 12, and is connected to the drainage vertical pipe 34 extending in the vertical direction of the household.

(Tube catcher)

As shown in FIG. 2, the tube trap 24 of the present embodiment is a so-called water-sealed trap that has a substantially S-shape in a side view. In addition, the tube trap 24 of this embodiment is connected to the pressure adjustment device 65 mentioned later.

As shown in FIG. 3A, the tube catcher 24 of this embodiment is provided with an inflow-side piping connection portion 36 that connects the lower end portion of the piping 22, a substantially U-shaped first curved pipe portion 38, and a first curved pipe The vertical pipe portion 40 on the downstream side of the drainage direction of the portion 38, the second curved pipe portion 42 formed in the substantially inverted U-shape on the downstream side of the vertical pipe portion 40 in the drainage direction, and the second curved pipe portion 42 formed on the The reduced-diameter pipe portion 44 on the downstream side in the drainage direction and the discharge-side pipe connection portion 46 formed on the downstream side of the reduced-diameter pipe portion 44 in the drainage direction and connected to the upper end portion of the pipe 26.

The inflow-side pipe connection portion 36 is formed in a cylindrical shape with an axis in the vertical direction. As an example, the inflow-side pipe connection portion 36 has an inner diameter D1 into which the lower end portion of the pipe 22 with a nominal diameter of 30A is inserted.

A male screw 36A is formed on the outer periphery of the upper end side of the inflow-side pipe connection portion 36, and the male screw 36A is a female screw 48A to which the annular nut of the fixing pipe 22 is screwed.

A step portion 36B is formed at an end portion of the inflow-side pipe connection portion 36 on the downstream side in the drainage direction. This section 36B is connected by the lower end of the pipe 22 inserted into the inflow-side pipe connection portion 36.

The inner diameter of the first curved pipe portion 38 gradually decreases toward the downstream side in the drainage direction, and the inner diameter D2 of the end of the drainage inflow side is the same as the inner diameter of the pipe 22 (for example, φ30mm), and the drainage is discharged The inner diameter D3 of the side end is φ25mm as an example.

In addition, in the first curved pipe portion 38, the portion that is bent laterally downward from the upper direction on the upstream side in the drainage direction is the first lower curved pipe portion 38A, and is curved upward from the laterally upward direction on the downstream side in the drainage direction. The part is the first upper curved tube portion 38B.

Here, the tangent line L1 on the upstream end of the axis line 38CL of the first curved pipe portion 38 in the drainage direction is relative to the axis line 36CL of the inflow-side pipe connection portion 36 (with respect to the pipe 22 inserted into the inflow-side pipe connection portion 36). The axis 22CL is coaxial) and intersects with an angle θ1.

Therefore, compared with the case where the angle θ1 is not crossed, the drainage flowing from the inflow-side pipe connection portion 36 (pipe 22) to the first curved pipe portion 38 receives resistance.

In other words, when the gas flows from the first curved pipe portion 38 to the inflow-side pipe connection portion 36 (pipe 22), the gas also receives resistance. Here, although it is explained that "drainage will bear resistance", this is an explanation in comparison with the case where there is no angle θ1 and crosses. In fact, there is no problem when draining water from the flow processing table 16.

When the radius of curvature of the axis 38ACL of the first lower curved tube portion 38A is R1, and the radius of curvature of the axis of the first upper curved tube portion 38B is R2, then R1>R2. The radius of curvature R1 and the radius of curvature R2 are respectively a single radius of curvature.

In addition, the upstream end in the drainage direction of the first curved pipe portion 38 (the portion where the inner diameter D2 is described) is located lower than the downstream end in the drainage direction (the portion where the inner diameter D3 is described).

A cylindrical cleaning port 52 is provided at the lower end of the first curved pipe portion 38. A male thread 52A is formed on the outer periphery of the cleaning port 52. By screwing the female thread 54A of the cover 54 to the male thread 52A for fastening, the cover 54 is installed on the cleaning port 52 to plug the cleaning port. 52. In addition, in this embodiment, although the cleaning port 52 is provided in the lower end part of the 1st bending pipe part 38, the cleaning port 52 may be provided as needed, and it does not have to be provided.

The vertical pipe portion 40 arranged on the downstream side in the drainage direction of the first upper curved pipe portion 38B has a cylindrical shape, and its axis 40CL is in the vertical direction. The inner diameter D4 of this vertical pipe part 40 is the same inner diameter (φ25mm) as the inner diameter D3 of the drain discharge side end part of the 1st curved pipe part 38.

In addition, the axis 40CL of the vertical pipe portion 40 and the tangent line L2 on the downstream end of the axis CL of the first upper curved pipe portion 38B in the drainage direction are coaxial and coincide with each other.

The inner diameter of the second curved pipe portion 42 arranged on the downstream side in the drainage direction of the vertical pipe portion 40 gradually decreases in diameter toward the downstream side in the drainage direction.

In the second curved pipe portion 42, the portion that is bent laterally and upwardly from the downward direction on the upstream side in the drainage direction is the second upper curved pipe portion 42A, and the portion that is bent downwardly from the laterally downward direction on the downstream side in the drainage direction is The second lower bending tube portion 42B.

The inner diameter D5 of the drain inflow-side end of the second curved pipe section 42 (the connection part with the vertical pipe section 40) is the same as the inner diameter D4 of the vertical pipe section 40. The inner diameter D6 of the drain discharge side end (the connecting portion with the reduced-diameter pipe portion 44) is φ20mm as an example.

The radius of curvature of the axis 42CL of the second curved tube portion 42 is R3. The tangent line L3 on the upstream end of the axis 42CL of the second curved pipe portion 42 in the drainage direction and the axis 40CL of the vertical pipe portion 40 have no angle but are coaxial and coincide (overlap).

A cylindrical pressure relief device attachment portion 56 extending upward in the vertical direction and opening upward is integrally formed in the middle portion in the drainage direction of the second lower curved pipe portion 42B. A male screw 56A is formed on the outer periphery of the pressure relief device mounting portion 56. The male screw 56A is screwed with a ring-shaped nut inserted into the pipe portion 82 provided on the pressure relief device 66 of the pressure regulator 65 to be described later. 57 of female thread 57A.

A rectifying member 58 is inserted into the inside of the pressure relief device mounting part 56. The rectifying member 58 includes a cylindrical portion 58A that can be inserted into the pressure relief device attachment portion 56, and a fin 58B is integrally formed at the lower end of the cylindrical portion 58A. The protruding piece 58B protrudes into the inside of the second lower curved pipe portion 42B, and is relative to the vertical The direction is inclined so as to guide the flow direction of the drainage from the upstream side to the reduced-diameter pipe portion 44 side. In other words, the fins 58B make it difficult for the drainage flowing from the upstream side to flow into the pressure adjusting device 65 to be described later.

The reduced-diameter pipe portion 44 provided on the downstream side of the drainage direction of the second lower curved pipe portion 42B in the drainage direction has a cylindrical shape whose inner diameter gradually decreases toward the downstream side in the drainage direction, and the axis 44CL is the vertical direction . The inner diameter of the drain inflow-side end of the reduced-diameter pipe portion 44 (the connection part with the second lower bend pipe portion 42B) is the same as the inner diameter D6 of the end on the downstream side of the second lower bend pipe portion 42B in the drainage direction. the inside diameter of. On the other hand, the inner diameter D7 of the drain discharge side end of the reduced-diameter pipe portion 44 is φ16 mm as an example.

In addition, the tangent line L4 on the downstream end of the axis 42CL of the second curved pipe portion 42 in the drainage direction and the axis 44CL of the reduced-diameter pipe portion 44 have no angle but are coaxial and coincide (overlap).

On the downstream side of the reduced-diameter pipe portion 44 in the drainage direction, a discharge-side piping connection portion 46 is provided coaxially with the cylindrical reduced-diameter pipe portion 44. In addition, a segment portion 46A whose diameter is reduced toward the reduced-diameter pipe portion 44 is formed at an end portion of the discharge-side pipe connection portion 46 on the upstream side in the drainage direction. This section 46A is connected by the upper end of the pipe 26 inserted into the discharge side pipe connection portion 46.

A male screw 46B is formed on the outer periphery of the lower end of the discharge side pipe connection portion 46, and the male screw 46B is a female screw 64A screwed with the annular nut 64 of the fixing pipe 26. In addition, as an example, the discharge-side pipe connection portion 46 of the present embodiment has an inner diameter D8 into which the pipe 26 with a nominal diameter of 20A can be inserted.

In this pipe catcher 24, the part of the drainage discharged from the flow table 16 is stored in the inflow-side piping connection portion 36, the first curved pipe portion 38, the vertical pipe portion 40, and the second curved pipe portion 42 as Seal water. In addition, the two-dot chain line indicated by the symbol Ws in FIG. 3A represents the water surface of the sealed water in the normal state.

In addition, the height of the liquid surface Ws of the sealing water stored in the tube trap 24 in the normal state will be the same as the height position of the uppermost end Pt of the inner flow channel wall surface inside the bending radius of the second curved tube portion 42. Suppose that when the liquid level Ws of the drainage rises to be higher than the uppermost end Pt, the drainage will exceed the uppermost end Pt and flow to the downstream side in the drainage direction. Finally, the liquid level Ws will coincide with the height position of the uppermost end Pt.

In addition, as shown in FIG. 3B, the sealing water depth h of the sealing water in the pipe trap 24 of the present embodiment refers to the depth h from the upper inner peripheral surface 38UF of the pipe of the first curved pipe portion 38 having a substantially U-shape. The dimension measured in the vertical direction from the lowermost end Pu to the uppermost end Pt of the inner flow path wall surface inside the bending radius of the second curved pipe portion 42. In addition, as an example, the sealing water depth h has a size (50 mm or more as an example) determined by a specification (as an example, a drainage facility technical standard) to prevent the pipe trap 24 from breaking.

The end of the drainage inflow side of the pipe trap 24, that is, the height position of the upper end 36T on the upstream side of the drainage direction of the inflow piping connection portion 36, is preferably set in the pipe inside the first curved pipe portion 38 Between the lowermost end part Pb of the middle part and the uppermost end part Pt of the second curved pipe part 42. In this embodiment, the height position of the upper end portion 36T of the inflow-side pipe connection portion 36 is located at the same height as the height position of the uppermost end portion Pt of the second curved pipe portion 42.

(Pressure adjustment device)

The configuration of the pressure adjusting device 65 of the present embodiment includes a pressure relief device 66, a check valve 90, and a vent valve 110.

(Pressure Relief Device)

As shown in Figures 4 and 5, the pressure relief device 66 installed in the pressure relief device mounting portion 56 is composed of a thin elastic expansion and contraction body 68 formed of an elastic material such as rubber, and a supporting elastic expansion and contraction body. The lower support member 70 on the lower end side of 68, the upper support member 72 on the upper end side of the elastic expansion and contraction body 68, and the outer cover 74 are supported.

The elastic expansion/contraction body 68 is provided with a cylindrical expansion/contraction part 68A whose cross-sectional shape in a free state is formed into a substantially cross shape as shown in FIG. 6. An annular base 68B extending radially outward is integrally formed at both ends of the expansion and contraction part 68A in the axial direction. The outer circumference of the base part 68B is integrally formed to install the elastic expansion and contraction body 68 on the lower side. The supporting member 70 and the ring-shaped mounting portion 68C of the upper supporting member 72 are formed. In addition, a thick rib 68D is formed at the end of the attachment portion 68C.

As shown in Figures 4 and 5, the mounting portion 68C on the lower side of the elastic expansion and contraction body 68 is clamped and fixed between the lower support member 70 and the outer cover 74, and the rib 68D is inserted into the outer periphery of the lower support member 70环槽78。 Ring groove 78.

In addition, the mounting portion 68C on the upper side of the elastic expansion and contraction body 68 is clamped and fixed between the upper support member 72 and the outer cover 74, and the rib 68D is inserted into the annular groove 78 formed on the outer periphery of the upper support member 72.

A tapered through hole 80 is formed in the center of the lower support member 70, and an insertion tube 82 communicating with the through hole 80 is protruded downward in the center of the lower surface. As shown in FIG. 3A, the insertion tube portion 82 is inserted into the pressure relief device installation portion 56 of the tube catcher 24, and the pressure relief device 66 is installed on the tube catcher 24.

As shown in FIG. 4, a tapered through hole 84 is formed in the center of the upper support member 72, and a cylindrical check valve attachment portion 86 that communicates with the through hole 84 is projected upward in the center of the upper surface. Here, a male screw 86A is formed on the outer periphery of the check valve mounting portion 86.

(Check valve)

As shown in FIG. 4, the check valve 90 is attached to the check valve attachment part 86 of the pressure relief device 66. As shown in FIG.

The structure of the check valve 90 includes a cylindrical body 92, a spherical valve body 94, a cover 96, and the like. A female thread 92A is formed on the inner circumference of the lower part of the main body 92, and the check valve installation part of the pressure relief device 66 The male thread 86A of 86 is screwed to this female thread 92A to be fastened, and the check valve 90 can be mounted on the pressure relief device 66.

A partition wall 98 that partitions the inside up and down is formed inside the main body 92, and a dome-shaped valve body support part 100 protruding upward is integrally formed in the center of the partition wall 98. The valve body support portion 100 prevents the valve body 94 from moving downward, so that the valve body 94 does not drop the pressure relief device 66 downward.

A plurality of through holes 102 are formed on the radially outer side of the valve body supporting portion 100 in the partition wall 98. The through hole 102 connects the space on the upper side of the partition wall 98 with the space on the lower side, and allows drainage and air to pass therethrough.

The spherical valve body 94 has a specific gravity set so that when the drainage passes through the through hole 102 and flows into the space above the partition wall 98, it floats on the drainage.

The cover 96 is formed with a female screw 96A for screwing with the male screw 92B formed on the outer circumference of the upper part of the main body 92. By screwing the female screw 96A to the male screw 92B for fastening, the cover 96 can be fastened. Installed on the main body 92.

The cover 96 is provided with a valve seat 104, and a valve hole 106 is formed in the center of the valve seat 104. The valve hole 106 is blocked by the valve body 94 floating on the drain. Therefore, even if the drain water penetrates into the pressure relief device 66, the drain can be suppressed from flowing out above the check valve 90. In addition, the check valve 90 may be provided as needed, or not provided.

(Ventilation)

A vent valve 110 is installed above the check valve 90. The vent valve 110 of this embodiment is attached to a drain trap or a drain pipe. Since it has a general structure, a description of the structure is omitted. In addition, the vent valve 110 sucks in external air when the downstream side in the drainage direction becomes negative pressure, thereby preventing the tube trap 24 from breaking (the accumulated sealing water is sucked to the downstream side in the drainage direction and disappears due to the negative pressure) .

The vent valve 110 sucks in the atmosphere to protect the sealing water of the tube trap 24 when draining water, and closes the valve at normal times to prevent malodor leakage and the like. As the vent valve 110, a well-known one (as an example, one described in JP 2009-299866 A) can be used.

In addition, "negative pressure" means that the pressure is lower than the external air in the environment where the drainage pipe structure 10 is arranged.

(The first modification of the pressure relief device)

FIG. 7 shows a pressure relief device 120 having a structure different from that of the pressure relief device 66 shown in FIG. 4. The pressure relief device 120 shown in FIG. 7 basically has the same structure as the pressure relief device 66 shown in FIG. 4, but some of the shapes and parts are different. In addition, the same reference numerals are given to configurations that are basically the same even though the shapes are different to omit the description.

The elastic expansion and contraction body 68 of the pressure relief device 120 of this embodiment has a cylindrical shape in the free state shown by the two-dot chain line, and when the internal pressure rises, it elastically deforms and protrudes radially outward as shown by the solid line. , So you can cushion the pressure.

The mounting part 68C of the elastic expansion-contraction body 68 is fixed by the ring 122 arrange|positioned on the outer peripheral side. In addition, the upper support member 72 supporting the upper end side of the elastic expansion/contraction body 68 and the lower support member 70 supporting the lower end side of the elastic expansion/contraction body 68 are connected by a cylindrical support member 124. In addition, the support member 124 is configured to be divided into two in the radial direction, and is connected by a hinge (not shown) to be openable and closable.

(The first modification of the check valve)

In addition, in the check valve 90 shown in FIG. 4 and the check valve 90 shown in FIG. 7, although the valve body 94 is spherical, as an example, the valve body 94 may have a large-diameter portion as shown in FIG. The shape of the cylindrical valve body 112 that enters the small diameter portion 112B of the valve hole 106 and 112A is not limited. By being constructed in this shape, it can be achieved The upper surface of the large-diameter portion 112A can achieve the water-retaining effect. Since the water-retaining function is not achieved by dots like a sphere, the water-retaining function can be improved.

(Second drainage system)

In Fig. 1, the second drainage system 2 is a piping structure that allows drainage from the dishwasher 18 as an example of the second water appliance to flow. A pressure pump (not shown) is built in the drain part of the dishwasher 18, and the drain is pushed by the pressure pump to make it flow. The dishwasher 18 or the second drainage system 2 is provided with a primary drainage trap 202 as a second drainage trap. The second drainage system 2 is provided with, for example, a secondary drainage trap 203 as a third drainage trap, a temporary storage section 204, a pressure reduction pipe 206, and an ascending section 208. In FIG. 1, the primary drainage trap 202 is built in the dishwasher 18. In addition, the primary drainage trap 202 may be provided in the second drainage system 2 instead of the dishwasher 18. In this case, the secondary drainage trap 203 may also be used as the primary drainage trap 202.

The second drainage system 2 is connected to the horizontal pipe 30A of the siphon drainage pipe 30 on the downstream side of the first drainage system 1. Specifically, the horizontal pipe 30A is provided with a junction 28 on the downstream side of the first drainage system 1, and the pipe 210 on the downstream side of the riser 208 in the second drainage system is connected to the junction 28.

The secondary drainage trap 203 is a U-shaped tube trap that is provided between the primary drainage trap 202 and the temporary storage part in the second drainage system 2 and is, for example, a U-shaped tube trap that is bent and protruded downward. The pipe 212 on the downstream side of the secondary drain trap 203 extends upward and then extends laterally, and is connected to the inlet 204A of the temporary storage portion 204.

(Temporary Storage Department)

In FIG. 9, the temporary storage portion 204 is provided in the second drainage system 2 and the inlet 204A is provided at a higher position than the outlet 204B, and the volume per unit length of the second drainage system 2 is partially enlarged. in other words, The temporary storage part 204 is a chamber that can temporarily store drainage. The temporary storage portion 204 is formed, for example, in a cylindrical shape (for example, a cylindrical shape or a quadrangular cylindrical shape) whose vertical direction is the axial direction. Specifically, the temporary storage portion 204 is configured to include a cylindrical main body 214, an upper body 216, and a lower body 218. The upper end and the lower end of the upper body 216 have large-diameter portions 216A and 216B, respectively. The inner diameter of the main body 214 is set to be larger than the inner diameter of the pipe 212. The large diameter portion 216A at the upper end is detachably fitted with the cover member 220, for example. In Fig. 10, the cover member 220 (Fig. 9) has been removed. By removing the cover member 220 in this way, an opening 216D is formed in the large-diameter portion 216A. This opening can be used as a cleaning port. In addition, the cover member 220 may not be provided, and the upper end of the upper body 216 (temporary storage portion 204) may be blocked.

The large diameter portion 216B at the lower end is, for example, fitted with the upper end of the main body portion 214. A small diameter part 216C is provided between the large diameter parts 216A and 216B. The entrance 204A of the temporary storage part 204 is provided in the small diameter part 216C. As shown in FIG. 11, the entrance 204A takes the lateral direction as the axis direction, and the axis X1 of the entrance 204A is eccentric with respect to the axis Z of the temporary storage portion 204.

A large-diameter portion 218A is provided at the upper end of the lower body 218. Here, the large-diameter portion 218A is fitted with the lower end of the main body portion 214, for example. The outlet 204B of the temporary storage portion 204 is provided at the lower end of the lower body 218, and the transverse direction is the axial direction. As shown in FIG. 11, the axis X2 of the outlet 204B is not eccentric with respect to the axis Z of the temporary storage portion 204.

As shown in FIG. 9, in the temporary storage portion 204, the inner surface 218B of the outlet 204B on the opposite side of the outlet 204B in the axial direction is curved so that when the drainage is discharged from the temporary storage portion 204, the drainage is directed toward the outlet 204B. In other words, the lateral distance between the inner surface 218B and the outlet 204B will decrease as it goes downward. As long as they have the same configuration, the inner surface 218B may be an inclined surface, a combination of an inclined surface and a curved surface, or the like.

(Pressure reduction piping)

In FIG. 9, a pressure reducing pipe 206 is provided between the temporary storage portion 204 and the rising portion 208 in the second drainage system 2. This pressure reducing pipe 206 is a pipe for reducing the drainage pressure of the second drainage system 2. In the example shown in FIG. 9, the pressure reducing pipe 206 has a bent pipe. This duct is formed in a wave shape with amplitude in the radial direction of the temporary storage part 204, and has, for example, two turn-back parts 206A and 206B. Thereby, the flow direction of the drainage is reversed at the turn-back portions 206A and 206B, respectively.

The configuration of the pressure reduction pipe 206 is not limited to this, and may be the configuration shown in FIGS. 12 to 16. In Modification 1 shown in FIGS. 12 to 14, the inlet 222 and the outlet 224 are respectively provided in the up-down direction, and a winding part 226 is provided between the inlet 222 and the outlet 224. The inlet 222 opens at the end on the central side of the winding part 226, and the outlet 224 opens at the end outside the winding part 226. The flow direction of the drain water is bent at a position from the inlet 222 to the winding part 226, for example, from the up-down direction at a substantially right angle to the lateral direction (the bent part 226A in FIG. 13). Afterwards, it will be reversed while maintaining the transverse direction at the turned-back portion 226B, and bend at approximately right angles at the bending portions 226C and 226D, respectively. Then, at the point where it flows out from the winding part 226 to the outlet 224, it is bent substantially at right angles from the lateral direction to the vertical direction (the bent part 226E in FIG. 14).

In Modification 2 shown in FIG. 15, the pressure reducing pipe 206 has a pipe whose inner diameter is reduced, and the inner diameter changes periodically. Specifically, the pressure reducing pipe 206 is formed in a cylindrical shape extending linearly, for example. A large-diameter portion 228 and a small-diameter portion 230 are alternately formed in the axial direction on the inner surface of the pressure reducing pipe 206. The boundary between the large-diameter portion 228 and the small-diameter portion 230 is, for example, a step perpendicular to the axial direction. Both ends of the pressure reducing pipe 206 are, for example, large-diameter portions 228, one of which is an inlet 232, and the other is an outlet 234. In Modification 3 shown in FIG. 16, the pressure reduction pipe 206 has a branch pipe 236. The branch pipeline 236 branches from the upstream (inlet 238) to the downstream (outlet 240) pipeline, and the end will be blocked. In this example, the pipes facing the inlet 238 and the outlet 240 are bent approximately at right angles, and the inlet 238 in this bend is Branch pipes 236 are provided on the extension line of. The length of the branch pipe 236 is, for example, less than the inner diameter of the pipe. The drain will temporarily flow into the branch pipe 236, and by obstructing the flow of the drain, the drain will cause a pressure loss.

In addition, although the illustration is omitted, the pressure reducing pipe may be configured such that the inner diameter of the pipe from the inlet to the outlet gradually increases in diameter. In addition, although the illustration is omitted, the inner diameter of a plurality of pipes formed with a pipe may be temporarily enlarged and then reduced in diameter to return to the normal inner diameter. In other words, the inner wall of the pipe may also be formed in a zigzag shape with respect to its axial direction. The range of the angle formed by the inner wall and the axial direction is, for example, 30-40°, preferably 33-36°.

In addition, the structure of the pressure reduction pipe 206 is not limited to this, as long as it is a structure that causes a pressure loss in the drain flowing through the pressure reduction pipe 206. For example, protrusions may be provided on the inner surface of the pipe to generate turbulent flow.

(Ascending part)

In FIG. 9, the ascending part 208 is located between the temporary storage part 204 in the second drainage system 2 and the siphon drain pipe 30 (FIGS. 1, 17, and 18 ). The ascending part 208 only needs to have a structure capable of storing sealed water like a U-shaped or S-shaped tube trap. As an example, the ascending part 208 has a descending part 208A, a lowermost part 208B, an ascending part 208C, and an uppermost part 208D.

The down part 208A is connected to the downstream side of the temporary storage part 204, and is a part which makes the pipe run downward. In this embodiment, the pressure reducing pipe 206 is connected to the downstream side of the temporary storage portion 204, and the outlet 206C at the lower end of the pressure reducing pipe 206 is connected to the downward portion 208A. On the downstream side of the temporary storage portion 204, since the pressure reduction pipe 206 also causes the pipe to travel downward, it can be considered that the pressure reduction pipe 206 can also be used as the downward portion 208A. When the pressure reduction pipe 206 is omitted The portion extending downward from the exit 204B of the temporary storage portion 204 constitutes the downward portion 208A (Figures 17 and 18).

The lowest part 208B is the lowest position among the rising parts 208. The uppermost part 208D is, for example, a horizontal part, but it does not need to be horizontal as shown in FIGS. 17 and 18. The upward portion 208C is a portion that linearly extends from the downstream end portion of the lowermost portion 208B, for example, diagonally upward. The shape of the upward portion 208C is not limited to a linear shape, and may be curved. The uppermost part 208D is a part extending in the horizontal direction from the upper end of the upward part 208C, for example, and is the highest position in the upward part 208. The uppermost part 208D does not have to have a horizontal part, and the horizontal part may be omitted and the uppermost part 208D may be directly connected to the pipe 210. The piping 210 is the piping 210 on the downstream side of the ascending part 208, and it extends downward and is connected to the horizontal pipe 30A (siphon drain pipe 30) (FIG. 1, FIG. 17).

The uppermost part 208D of the ascending part 208 may be set at a position above the height of the exit 204B of the temporary storage part 204. The line L in FIG. 9 represents the height position of the bottom of the outlet 204B of the temporary storage portion 204. In this example, the height position of the top part 208E of the inner surface in the uppermost part 208D is set to a position above the height of the line L. The position above the height of the line L is the height position equal to the height of the line L or a height position higher than the height of the line L.

In addition, if the height position of the uppermost part 208D is increased, the amount of drain water 242 stored in the temporary storage part 204 will increase, and if the height position of the uppermost part 208D is lowered, the amount of drain water stored in the temporary storage part 204 will be increased. It will become less. As shown in the example of FIG. 17, the uppermost portion 208D of the rising portion 208 is set at a position lower than the height of the exit 204B of the temporary storage portion 204. When the height position of the uppermost part 208D is too low, since the drainage 242 in the temporary storage part 204 will flow out, the height position of the uppermost part 208D can be arbitrarily changed within the limit that the temporary storage part 204 can store the drainage.

(Effect)

Next, the function and effect of the drainage pipe structure 10 of this embodiment are demonstrated.

When the drainage table 16 is used and the drainage is discharged from the drainage platform 16, the drainage passes through the waste processor 20, the pipe 22, and the pipe catcher 24 and flows to the pipe 26.

After that, the drainage will flow through the horizontal pipe 30A of the siphon drainage pipe 30 and the vertical pipe 30B. When a part of the vertical pipe 30B is filled with drainage, the drainage in the vertical pipe 30B will fall due to gravity. A siphon force corresponding to the head difference in the vertical pipe 30B is generated inside the pipe 30B.

The drainage in the horizontal pipe 30A will be attracted to the vertical pipe 30B due to the siphon force, and the horizontal pipe 30A and the vertical pipe 30B will become a full flow state filled with drainage, so the flow velocity will increase and the horizontal pipe 30A, and The vertical pipe 30B flows downward, and the drainage from the flow table 16 will be discharged to the drainage vertical pipe 34.

On the other hand, when the drain is discharged from the dishwasher 18, since the drain pushes the air inside the pipe 210 to the downstream side in the drainage direction, the air inside the horizontal pipe 30A and the pipe will be pushed to make the inside of the horizontal pipe 30A It becomes a positive pressure, and this positive pressure also passes through the pipe 26 and acts on the tube trap 24 side.

In addition, “positive pressure” means that the pressure is higher than the outside air in the environment where the drainage pipe structure 10 is arranged.

Here, when the drain water is discharged from the dishwasher 18 instantaneously, a large positive pressure will act on the horizontal pipe 30A and the piping 26 at one time, and this will cause the sealing water to flow back to the flow table 16 side. The tube trap 24 may be broken. In addition, when a large amount of drain water is discharged from the dishwasher 18 instantaneously, the drain water discharged from the dishwasher 18 may flow back to the pipe catcher 24 side and overflow through the pipe catcher 24. In the present embodiment, it is possible to prevent the sealing water of the tube catcher 24 from breaking the seal and the drainage discharged from the dishwasher 18 from overflowing through the tube catcher 24 in the following manner.

(1) When the drain water is discharged from the dishwasher 18 instantaneously, and the positive pressure in the pipe 26 rises instantaneously, the pressure in the pipe 26 will become positive, and the air in the pipe 26 will be trapped inside the pipe trap 24. countercurrent, However, the positive pressure can be suppressed by the pressure relief device 66 provided on the downstream side of the drainage direction of the sealing water to prevent the sealing water from breaking (in this case, the breaking of the sealing water caused by the reverse flow).

(2) Next, by comparing the tube catcher 24 of this embodiment with the tube catcher of the conventional structure, it is determined that the drain water flowing backward from the dishwasher 18 does not easily overflow through the tube catcher of this embodiment. Description of the device 24.

As shown in FIG. 3B, the side view shape of the portion corresponding to the first curved portion 38 of this embodiment in the conventional pipe trap is a circle with a single radius of curvature, and corresponds to the upper inner circumference of the pipe of this embodiment The upper inner peripheral surface of the pipe on the surface 38UF is a partial arc shape of an imaginary circle shown by the two-dot chain line FC1. In addition, the diameter of the circle shown by the two-dot chain line FC1 is the length of the straight line connecting P1 and P2.

As an example, the sealing water depth h is a dimension determined by specifications. Therefore, the position of the liquid surface on the downstream side of the sealing water of the conventional pipe trap is located in the upper side of the arc-shaped pipe shown from the two-point chain line FC1 The height of h from the lower end P'u of the peripheral surface.

That is, the uppermost end P't of the conventional tube trap corresponding to the uppermost end Pt of the tube trap 24 of the present embodiment is located more than the uppermost end Pt of the tube trap 24 of the present embodiment. To lower the alpha position.

Therefore, when the tube catcher 24 of this embodiment is installed at the same height as the conventional tube catcher, the position of the water-sealed water surface Ws can be arranged at a position higher than that of the conventional tube catcher. The water surface should be higher than α.

Thereby, in the pipe catcher 24 of the present embodiment, the drain water that is discharged from the dishwasher 18 on the downstream side and rises, that is, the reverse flow of the drain water, does not easily reach the sealing water stored in the pipe catcher 24, and can suppress The condition of the sealing water overflowing through the tube catcher 24.

(3) In addition, assuming that the downstream side of the pipe trap 24 in the drainage direction of the sealing water becomes negative pressure, the outside air will pass through the vent valve 110 and the pressure relief device 66 and be introduced to the second lower part of the pipe trap 24 The bent pipe portion 42B reduces the negative pressure acting on the sealing water, and can suppress the breaking of the seal due to the negative pressure.

(4) In the tube trap 24 of this embodiment, since the horizontal distance Lb is set to be smaller than the horizontal distance La, compared to the case where the horizontal distance La and the horizontal distance Lb are the same, the first The rise of the pipe of the curved pipe portion 38B will change, and the drainage will flow more easily.

(5) In addition, when the drain water is discharged from the flow processing table 16, the drain water flows through the scrap processor 20, the piping 22, and the tube trap 24 in order. When the drainage flows through the second curved pipe portion 42 of the pipe trap 24, the drainage is guided to the side of the reduced diameter pipe portion 44 due to the fins 58B protruding into the inside of the second lower curved pipe portion 42B. The drain discharged from the platform 16 cannot easily enter the pressure relief device 66.

(6) When the dishwasher 18 drains water, the drain water flows into the siphon drain pipe 30 through the primary drain trap 202, the temporary storage portion 204, and the rising portion 208. When the inside of the siphon drain pipe 30 becomes a full flow state, a siphon force is generated, and the drain is attracted to the downstream side. Since the temporary storage portion 204 is provided in the second drainage system 2, even if the drainage pressure of the dishwasher 18 is high and the drainage flow rate is large, the temporary storage portion 24 can receive the drainage and release the drainage pressure. Therefore, when the dishwasher 18 drains water, it is possible to prevent the drain from flowing back to the side of the first water appliance connected to the upstream side of the dishwasher 18.

Furthermore, since the entrance 204A of the temporary storage part 204 is in the transverse direction as the axis, the axis X1 of the entrance 204A is eccentric with respect to the axis Z of the temporary storage part 204 (Figure 11), so the temporary storage part is easy to produce The air in 204 and drain 242 alternate. Specifically, as the drain 242 flows downward along the inner wall of the temporary storage portion 204, it is less likely to receive air resistance when the drain 242 flows in. Therefore, the drainage 242 flows into the temporary storage part 204 smoothly. In this way, the air from the temporary storage part can be suppressed 204 discharged. In addition, the air flowing into the first hydraulic appliance side can be reduced by this, and the pressure increase on the first hydraulic appliance side can be suppressed.

In addition, since the outlet 204B of the temporary storage portion 204 is in the lateral direction as the axis direction, the axis X2 of the outlet 204B is not eccentric with respect to the axis Z of the temporary storage portion 204 (FIG. 11), so it flows into the temporary storage portion 204 The drainage 242 of the water is easily concentrated at the outlet 204B. Furthermore, in the temporary storage portion 204, since the inner surface of the outlet 204B on the side opposite to the outlet 204B in the axial direction is curved so that the drainage 242 can be directed toward the outlet 204B when the drainage 242 is discharged from the temporary storage portion 204. Therefore, The drain water 242 that flows down along the inner surface on the side opposite to the outlet 204B is easily concentrated on the outlet 204B. Therefore, the drainage 242 flows out from the outlet portion 204B smoothly.

In FIGS. 17 and 18, when the generation of the siphon force ends, in the second drainage system 2, air will remain on the upstream side of the primary drainage trap 202 to the temporary storage portion 204, and the drainage 242 will be It remains on the downstream side in the temporary storage part 204 to the state of the ascending part 208. Specifically, the sealing water of the sealing water height H1 is formed in the rising part 208 on the downstream side of the temporary storage part 204. On the other hand, since the second drainage system 2 is blocked by the primary drainage trap 202 on the upstream side of the temporary storage portion 204, the drainage 242 remaining in the temporary storage portion 204 moves to the downstream side (water level). Down), the air remaining in the primary drainage trap 202 to the temporary storage portion 204 will expand. Therefore, the water level in the temporary storage portion 204 will drop to the level of the head pressure H2 (the force that moves the drainage to the downstream side) of the drainage 242 remaining in the temporary storage portion 204 and the primary drainage trap 202 to the temporary storage portion 204 The position where the negative pressure (force that prevents the drainage from moving to the downstream side) caused by the expansion of the air on the upstream side will be balanced. That is, the water level in the temporary storage portion 204 will drop to a position where the drainage does not overflow over the uppermost portion 208D of the rising portion 208 due to the relationship with the negative pressure caused by the aforementioned air expansion. In other words, the drainage 242 of the water level is stored in the temporary storage part 204.

In addition, since the secondary drainage trap 203 is additionally provided separately from the primary drainage trap 202, it is easy to form a closed state in the pipe on the upstream side of the temporary storage portion 204. Thereby, it is possible to stably generate a negative pressure in the pipe for storing the drainage in the temporary storage portion 204.

Thereby, the pipe from the part of the temporary storage portion 204 to the rising portion 208 is filled with the drainage 242, so that the pipe from the rising portion 208 to the siphon drain pipe 30 can be kept in a state with less air. In addition, by this, the air flowing into the first water appliance side can be reduced when the dishwasher 18 is drained next time, and the pressure increase on the first water appliance side can be suppressed. In addition, the water surface of the drainage 242 accumulated in the temporary storage part 204 will be kept constant, and will not be repeatedly wetted and dried. Therefore, dirt will not easily accumulate in the temporary storage part 204.

Furthermore, the temporary storage portion 204 is a part where the volume per unit length of the second drainage system 2 is partially enlarged, so the interior of the temporary storage portion 204 will not become dense due to the drainage 242. Therefore, the siphon force is hardly as high as the upstream side (dishwasher 18 side) of the temporary storage portion 204, and the sealing water of the primary drainage trap 202 or the sealing water of the secondary drainage trap 203 is not easily broken.

Furthermore, since the uppermost part 208D of the ascending part 208 is set at a position above the height of the outlet 204B of the temporary storage part 204, the drainage is easily filled between the temporary storage part 204 and the ascending part 208.

In addition, since the pressure reduction pipe 206 is provided in the second drainage system 2, even if the drainage pressure of the dishwasher 18 is high and the flow rate of the drainage 242 is large, the pressure reduction pipe 206 can reduce the drainage pressure, which can make The drainage speed is reduced. Therefore, when the dishwasher 18 drains water, it is possible to prevent the drain 242 from flowing back to the side of the first water appliance connected to the upstream side of the dishwasher 18.

In the pressure reduction piping 206 related to Modification 1 of Fig. 9, Fig. 13, and Fig. 14, when the drain water passes through the bent pipe, the drain can cause a pressure loss. In the pressure reduction piping 206 related to Modification 2 of FIG. 15, when the drain 242 passes through a pipe whose inner diameter is reduced, the drain can cause pressure loss in the drain. Therefore, the drainage pressure can be reduced. In the pressure reduction pipe 206 related to Modification 3 of FIG. 16, as part of the drain water flows into the branch pipe 236, the drain can cause pressure loss. Therefore, the drainage pressure can be reduced. In this way, the drainage pressure can be reduced by the various pressure reducing pipes 206.

In this way, according to the present embodiment, in a drainage pipe structure in which a plurality of water appliances are connected to one siphon drain pipe 30, when the water appliance connected to the downstream side drains water, it is possible to prevent the upstream water appliance from measuring the backflow and the The pressure on the water machine side rises.

In the pressure adjusting device 65 of the present embodiment, since the pressure reducing device 66 and the vent valve 110 are integrated and installed in the tube trap 24, it is compared with installing the pressure reducing device 66 and the vent valve 110 in the tube trap. In the case of different parts of 24, the drainage pipe structure 10 can be miniaturized.

In the pressure adjusting device 65 of this embodiment, since the lower support member 70 can support the weight of the vent valve 110 through the upper support member 72 and the outer cover 74, the elastic expansion and contraction body 68 can be expanded and contracted without being deformed.

In the pressure adjusting device 65 of this embodiment, since the upper support member 72, the outer cover 74, and the lower support member 70 support the elastic expansion and contraction body 68, even if the pressure change action is applied to the elastic expansion and contraction body 68, it can be suppressed The pressure adjusting device 65 is not moved in the axial direction.

[The second modification of the rectifying member and the second modification of the pressure relief device]

Next, the second modification example of the pressure relief device 66 and the second modification example of the rectifying member 58 described in the above-mentioned embodiment will be described based on FIGS. 19 to 21.

(Second modification of the rectifying member)

The rectification member 300 of the second modification shown in FIGS. 19 to 21 is entirely formed of an elastic body such as rubber or synthetic resin, and is elastically deformable. The rectifying member 300 includes a cylindrical portion 300A inserted into the pressure relief device attachment portion 56.

A flange 300C is formed on the upper end of the cylindrical portion 300A. The flange 300C is clamped between the lower end of the insertion tube portion 82 of the pressure relief device 66 and the segment formed on the inner peripheral surface of the pressure relief device attachment portion 56 to fix the rectifying member 300 to the pressure relief device attachment部56.

As shown in FIGS. 19 and 20, an opening 302 inclined with respect to the axis of the cylindrical portion 300A is formed at the lower end of the cylindrical portion 300A. The opening 302 is inclined so that the upstream side in the drainage direction becomes higher than the downstream side in the drainage direction. Therefore, the opening 302 has a substantially elliptical shape in a plan view (not shown).

On the upper end side of the opening 302, one end of the fin 300B having a valve body function for opening and closing the opening 302 is integrally connected. The connecting part 304 between one end of the lug 300B and the opening 302 has the function of a hinge, and the lug 300B can swing with the connecting portion 304 as a fulcrum (the direction of arrow A in FIG. 19 and the opposite direction of the arrow A direction) to open and close开部302。 Opening 302. In addition, the protruding piece 300B has the same substantially elliptical shape as the opening 302 to close the opening 302.

As shown in FIG. 19, the fin 300B in a normal state (a free state where the drainage does not flow) protrudes into the inside of the second lower curved pipe portion 42B. In more detail, when the imaginary line FL connected to the inner peripheral surface of the second lower curved pipe portion 42B is set to the opening of the pressure relief device mounting portion 56 provided in the second lower curved pipe portion 42B, the fin 300B Compared with this virtual line FL, it protrudes further to the inside of the 2nd lower bending tube part 42B.

In addition, in the present embodiment, the fin 300B is made to protrude further inside the second lower bending tube portion 42B than the virtual line FL. However, as long as the projecting piece 300B is protruded as necessary, it does not need to be protruded.

In general, a slit S is provided as a gap between the opening 302 and the protrusion 300B, and the protrusion 300B is separated from the opening 302 in general. Therefore, in the rectification member 300 at the normal time, the air permeable cylindrical portion 300A can pass through in the vertical direction.

The fin 300B is inclined with respect to the vertical direction to guide the flow direction of the drain water flowing from the upstream flow management platform 16 to the reduced-diameter pipe portion 44 side. In other words, the fin 300B has a flow direction for draining water It is a function to face the obliquely lower side on the downstream side in the drainage direction so that the drainage flowing from the upstream side does not easily flow into the pressure relief device 66 side. In addition, the fin 300B is curved in the same manner as the second lower curved pipe portion 42B, and the drainage flows along the curved fin 300B, so the flow of the general drainage is not hindered.

However, when a large amount of drainage is temporarily discharged from the flow table 16 to the fin 300B protruding to the inner side of the second lower curved pipe portion 42B (for example, when a large amount of water accumulated in the flow table 16 is caused to flow at once. This is so-called. The accumulation of flow), the protruding piece 300B will be pushed by a large amount of drainage to swing in the direction of arrow A, and the opening 302 can be blocked. Thereby, it is possible to prevent the drain discharged from the flow management table 16 from flowing back to the pressure relief device 66 side, and at the same time, it is possible to efficiently flow to the downstream side.

When the protrusion 300B is pushed by a large amount of drainage and swings in the direction of arrow A, and contacts the opening 302 to block the opening 302, in other words, the opening 302 is closed, as shown by the two-dot chain line in Figure 19 As shown, the size of the tab 300B (for example, the length in the long axis direction of the ellipse) is set to be larger than the opening 302, so that the tab 300B does not penetrate the opening 302 and enter the inner side of the cylinder 300A, and It protrudes to the outside of the opening 302 (the inner side of the second lower bending tube portion 42B).

Assuming that the size of the protrusion 300B is smaller than that of the opening 302, and the protrusion 300B pushed by the drain passes through the opening 302 and enters the inner side of the cylindrical portion 300A, the protrusion 300B may be caught on the inner surface of the cylindrical portion 300A. However, there is a concern that the tab 300B cannot return to its original position when the drain flow is completed.

In addition, in the present embodiment, when the opening 302 is closed with the fin 300B, although a part of the fin 300B protrudes outside the opening 302, as long as the fin 300B is pressed by the drain, the fin 300B will not It only needs to enter inside the cylindrical portion 300A, and the fin 300B can return to the original position when the drainage is completed.

For example, when the convex piece 300B is pressed by the drain to close the opening 302, the surface of the convex piece 300B may coincide with the virtual line FL connected to the inner peripheral surface of the second lower curved pipe portion 42B.

In the case where a large amount of drainage flows to close the opening 302, if the surface of the fin 300B coincides with the imaginary line FL connected to the inner peripheral surface of the second lower curved pipe portion 42B, the inside of the second lower curved pipe portion 42B is not A step difference that becomes the resistance of the drainage flow is generated, so that a large amount of drainage can flow more efficiently.

As shown in FIGS. 19 and 21, a plurality of ribs 306 are formed on the outer surface of the fin 300B, in other words, the inner outer surface facing the second lower curved tube portion 42B. The rib 306 extends along the longitudinal direction of the second lower curved pipe portion 42B, in other words, the flow direction of the drainage.

When the outer surface of the fin 300B is a flat surface, although foreign matter in the drainage (for example, foreign matter that is thin and easy to adhere like an onion skin) will easily adhere, if a plurality of ribs are formed on the outer surface of the fin 300B 306, the contact area between the protruding piece 300B and the foreign matter will be reduced, so the foreign matter will only stop at the contact rib 306, and the foreign matter can be prevented from adhering, in other words, it will be close to the protruding piece 300B. In addition, if the adhesion of foreign matter in the drainage can be suppressed, a hemispherical or other shaped protrusion may be provided on the outer surface of the fin 300B instead of the rib 306.

(The second modification of the pressure relief device)

Next, the pressure relief device 400 related to the second modification example will be described with reference to FIGS. 22 to 29.

As shown in FIGS. 22 to 24, the pressure relief device 400 related to the second modification is provided with a thin elastic expansion and contraction body 468 formed of an elastic material such as rubber, and a lower end side of the supporting elastic expansion and contraction body 468. The side support member 470, the upper support member 472 that supports the upper end side of the elastic expansion and contraction body 468, the outer cover 474, and the like.

As shown in FIGS. 25 and 26, the elastic expansion and contraction body 468 is a cylindrical body with an outlet and an inlet. The elastic expansion and contraction body 468 includes a cross-shaped cylindrical expansion and contraction portion 468A when viewed from the axial direction, and includes four expansion and contraction pieces 488 extending from the axis toward the radial direction (radial outer side). Therefore, a space S having a cross-sectional cross-sectional shape and extending in the axial direction is provided inside the expansion and contraction portion 468A.

A base portion 468B having a circular outer shape is integrally formed at both ends in the axial direction of the expansion and contraction portion 468A. An annular attachment portion 468C for attaching the elastic expansion and contraction body 468 to the lower support member 470 and the upper support member 472 is integrally formed on the outer periphery of the base portion 468B. In addition, a thick rib 468D is formed at the end of the mounting portion 468C.

As shown in FIG. 26(B), the expansion and contraction piece 488 is provided with a pair of wall portions 488A arranged in parallel and spaced apart from each other. link.

In addition, the adjacent wall portions 488A of one expansion/contraction piece 488 and the other expansion/contraction piece 488 adjacent to each other are connected to each other through an arc wall portion 488C having an arc shape in cross section.

Here, as shown in FIG. 26(B), when the axial middle part of the elastic expansion and contraction body 468 is cut from the direction intersecting the axis and viewed from the axial direction, it is assumed that one of the expansion and contraction pieces 488 is opposed to the wall part 488A. When the interval is A, and the diameter of the imaginary inscribed circle FC inscribed by the four arc wall portions 488C of the central part of the elastic expansion and contraction body 468 is B, the interval A<diameter B is defined.

As shown in FIG. 26C, in the cross-sectional space S, the inner part of the imaginary inscribed circle FC inscribed by the four arc wall portions 488C at the center of the elastic expansion and contraction body 468 is equivalent to the present disclosure The part of the first space extending from the inscribed circle FC in the radial direction corresponds to the second space of this disclosure. In addition, in this embodiment, the diameter B is equivalent to the maximum width of the first space of this disclosure. In addition, the interval A is equivalent to the maximum width of the second space of the present disclosure.

As shown in FIG. 25, a corner portion 490 formed by the wall portion 488A of one expansion/contraction piece 488, the wall portion 488A of the other expansion/contraction piece 488, and the base portion 468B adjacent to each other is formed to extend from the base portion 468B to the wall portion 488A rises smoothly and has an arc-shaped cross-section (or it can be relative to the base 468B Inclined inclined surface) toward the upper part 492. As shown in FIG. 26(A), the shape viewed from the axial direction toward the upper portion 492 is substantially triangular.

In the portion where the upper portion 492 is formed, the diameter B of the virtual inscribed circle FC (see FIG. 26(B)) gradually increases toward the radially outer side.

When the pressure of the expansion and contraction portion 468A in the internal space S is higher than the external pressure (atmospheric pressure), the portion recessed radially inward will expand radially outward (in the direction of the arrow shown in FIG. 26(B) as an example).

Assuming that the expansion and contraction portion 468A has a cylindrical shape, in order to expand the expansion and contraction portion 468A radially outward, the elastic member itself constituting the expansion and contraction portion 468A must be extended. In other words, when expanding the expansion and contraction portion 468A, the internal pressure of the expansion and contraction portion 468A must be increased considerably.

On the other hand, in the expansion and contraction portion 468A of this embodiment, as shown in FIG. 26(B), since the cross-sectional shape is formed in a cross shape, although the portion recessed inward in the radial direction will be caused by internal pressure during expansion. Being pushed to the outside in the radial direction causes the shape of the compressed portion 468A to be deformed. However, compared to the case where the expansion and contraction portion 468A has a cylindrical shape, only a small amount of tension is applied to the elastic body itself.

Therefore, when air flows into the expansion and contraction part 468A, the volume can be easily expanded, and the increase in the internal pressure can be further suppressed compared to the case where the expansion and contraction part 468A has a cylindrical shape.

In addition, when the corner portion 490 of the elastic expansion and contraction body 468 is formed with the upper portion 492 as in the present embodiment, compared with the case where the corner portion 490 is not formed with the upper portion 492, in other words, one wall portion 488A and the other When the wall portion 488A and the base portion 468B are connected at a right angle to each other at the corner portion 490, the expansion and contraction portion 468A becomes easier to expand outward, and it becomes easier to suppress the increase in internal pressure, that is, positive pressure.

On the other hand, when the downstream side of the pipe catcher 24 in the drainage direction becomes negative pressure, and the pressure of the internal space S of the expansion and contraction part 468A is lower than the external pressure (atmospheric pressure), as shown in FIG. 26(C), there will be expansion. Indentation 488 A situation where one wall portion 488A and the other wall portion 488A facing each other are in close contact with each other. However, in the axial part of the expansion and contraction part 468A, there remains a through space S1 (space The part of S is used as the gap of the air passage. The shape and size (radius of curvature) of the arc wall portion 488C are set by the method of the first space in the present disclosure.

That is, when the internal space S is at a negative pressure, the expansion/contraction portion 468A can suppress the inner peripheral surfaces from contacting each other to completely eliminate the space S. Therefore, in the elastic expansion and contraction body 468 of this embodiment, even when the internal space S is under a negative pressure, the through space S1 inserted in the axial direction can be secured, so that air can be ventilated in the axial direction.

As shown in Figures 23, 24, and 27, a lower support member 470 is inserted into the mounting portion 468C on the lower side of the elastic expansion and contraction body 468, and the mounting portion 468C is clamped between the lower support member 470 and the mounting portion. The mounting rings 496 arranged outside the 468C are fixed to the lower support member 470. In addition, the rib 468D of the mounting portion 468C is inserted into the annular groove 478 formed on the outer periphery of the lower support member 470 and is compressed.

In addition, the upper support member 472 is inserted into the mounting portion 468C on the upper side of the elastic expansion and contraction body 468, and the mounting portion 468C is clamped between the upper support member 472 and the mounting ring 496 arranged outside the mounting portion 468C to be fixed to Upper support member 472. In addition, the rib 468D of the mounting portion 468C is inserted into the annular groove 478 formed on the outer periphery of the upper support member 472 and is compressed.

As shown in FIGS. 22 and 28, the outer cover 474 having a cylindrical shape is composed of a first half member 474A on one side of the axis and a second half member 474B on the other side. In this embodiment, the outer cover 474 is a molded product of synthetic resin (for example, an injection molded product).

The first half-member 474A is provided with a circular arc wall portion 474Aa formed by halving a cylinder, an arc-shaped flange 474Ab is formed at the upper end, and an arc-shaped flange 474Ac is formed at the lower end.

The second half member 474B is provided with an arc wall portion 474Ba formed by halving a cylinder, an arc-shaped flange 474Bb is formed at the upper end, and an arc-shaped flange 474Bc is formed at the lower end (see FIG. 23).

A plurality of claw members 474Ae are formed on the inner surface side of the arc wall portion 474Aa of the first half member 474A, which protrude toward the inner surface side of the arc wall portion 474Ba of the second half member 474B and are caught The engagement hole 474Bd formed in the arc wall part 474Ba of the 2nd half member 474B.

In addition, a plurality of claw members 474Be are formed at the inner end of the arc wall portion 474Ba of the second half member 474B, which protrudes toward the inner surface side of the arc wall portion 474Aa of the first half member 474A. The engagement hole 474Ad formed in the arc wall portion 474Aa of the first half member 474A is engaged.

The first half member 474A and the second half member 474B are opposed to each other so that the claw member 474Be is caught in the engaging hole 474Ad, and the pawl member 474Ae is caught in the engaging hole 474Bd, whereby the first half member 474A The second half member 474B is fixed to each other to form a cylindrical cover 474.

As shown in FIG. 28, grooves 474Af are formed adjacent to the flange on both axial sides of the inner circumference of the first pair of half members 474A, and grooves 474Af are formed on both sides of the inner periphery of the second pair of half members 474B in the axial direction. A groove 474Bf is formed adjacent to each other. As shown in FIG. 23, the groove 474Af of the first half-member 474A and the groove 474Bf of the second half-member 474B are inserted with a mounting ring 496 for fixing the elastic expansion and contraction body 468.

As a result, the mounting ring 496 on the upper side of the elastic expansion and contraction body 468 is caught by the segment formed on the widthwise end of the groove 474Af on the upper side of the outer cover 474 and the widthwise end of the groove 474Bf. Section, and the mounting ring 496 that fixes the lower side of the elastic expansion and contraction body 468 is caught on the section formed on the width direction end of the groove 474Af under the cover 474 and the width direction end of the groove 474Bf The section formed. Thereby, the elastic expansion and contraction body 468 of the lower support member 470 and the upper support member 472 is fixedly installed inside the outer cover 474.

Since the upper support member 472 and the lower support member 470 of the elastic expansion and contraction body 468 are fixed inside the cover 474 in this way, even when the elastic expansion and contraction body 468 deforms due to changes in internal pressure, the elasticity can be suppressed. The expansion and contraction body 468 moves in the axial direction.

The lower support member 470 and the upper support member 472 are respectively covered by the outer cover 474 from the expansion and contraction direction of the elastic expansion and contraction body 468 (the direction intersecting the axial direction of the elastic expansion and contraction body 468) and the axial direction that intersects the expansion and contraction direction, To protect the elastic expansion and contraction body 468 to avoid contact with components other than the outer cover 474.

In addition, slits 474a are formed on the axial lower side of the first half member 474A and the second half member 474B so that when the elastic expander 468 expands and contracts inside the outer cover 474, air can circulate between the outer cover 474 and the outer cover 474. Between the space S2 between the elastic expansion and contraction bodies 468 and the outside air outside the outer cover 474. Thereby, the elastic expansion and contraction body 468 can be easily expanded and contracted.

A tapered through hole 480 is formed in the center of the lower support member 470, and an insertion tube 482 communicating with the through hole 480 protrudes downward in the center of the lower surface. The insertion tube portion 482 is inserted into the pressure relief device mounting portion 56 of the tube trap 24, so that the pressure relief device 400 is mounted on the tube trap 24.

As shown in FIGS. 23 and 27, a cylindrical check valve attachment portion 486 is protruded upward in the center of the upper support member 472. A male thread 486A is formed on the outer periphery of the check valve mounting part 486, and the vent valve 110 is mounted on the check valve mounting part 486 by the male thread 486A.

As shown in FIG. 27, a plurality of ribs 502 protruding inward in the radial direction and extending in the axial direction are formed on the inner peripheral surface of the check valve attachment portion 486. As a result, as shown in FIG. 29(A), a gap S3 for allowing air to flow in the axial direction is formed between the valve body 412 and the inner peripheral surface of the check valve mounting portion 486 described later.

As shown in FIGS. 27 and 29, a valve body support part 504 is formed at the lower end of the check valve attachment part 486 so that the valve body 412 described later does not fall to the pressure relief device 400 below. In addition, the valve body supporting portion 504 is formed with a plurality of holes 506 through which air can pass.

As shown in FIG. 23 and FIG. 29(A), the valve body 412 is arranged on the valve body supporting portion 504 inside the check valve mounting portion 486. The valve body 412 has a specific gravity set so that it can float on the drain.

The valve body 412 is formed into a substantially conical trapezoid as a whole. A ring-shaped recess 412A having an arc shape in cross section is formed in a radially outer portion on the upper side of the valve body 412.

A ring-shaped valve seat 508 formed of an elastic body such as rubber is attached to the upper portion of the check valve attachment portion 486.

As shown in Fig. 29(A), in general, the valve body 412 arranged on the valve body support portion 504 is separated from the valve seat 508, and air can pass through the gap S4 between the valve body 412 and the valve seat 508 and move up and down. Direction flows.

On the other hand, when the drain that rises backward from the lower pressure relief device 400 reaches the valve body 412, as shown in FIG. 29(B), the valve body 412 floats on the drain (not shown) and contacts the valve seat 508. The valve hole 508A formed in the center of the valve seat 508 is blocked.

Therefore, it is assumed that even when the drain water enters the pressure relief device 400, it is possible to prevent the drain water rising from the backflow of the pressure relief device 400 from flowing into the vent valve 110 arranged above. The check valve installation portion 86, the valve body 412, and the valve seat 508 constitute the float valve of the present disclosure.

As shown in FIG. 27, a plurality of protrusions 472A (only one is shown in FIG. 27) protruding outward in the radial direction are formed on the outer periphery of the upper support member 472. As shown in FIG. 22, this protrusion 472A is inserted into Fitting holes 510 formed in the first half-member 474A and the second half-member 474B. Thereby, the upper support member 472 and the outer cover 474 cannot rotate relatively. The protrusion 472A and the insertion hole 510 constitute the fixing part of the present disclosure.

In addition, such a protrusion 472A is not formed on the outer periphery of the lower support member 470. Therefore, the lower support member 470 is prevented from moving in the axial direction when the mounting ring 496 is inserted into the groove 474Af and the groove 474Bf of the cover 474. It can still rotate relative to the outer cover 474.

(Assembly sequence of pressure relief device 400)

As an example, the pressure relief device 400 is assembled in the following manner.

(1) Use the mounting ring 496 to install the upper support member 472 on the axial side of the elastic expansion and contraction body 468, and use the installation ring 496 to install the lower support member 470 on the other axial side of the elastic expansion and contraction body 468. .

(2) The above-mentioned elastic expansion and contraction body 468 to which the upper support member 472 and the lower support member 470 are attached is arranged between the first and second half members 474A and 474B facing each other, and the first half The member 474A and the second half member 474B are combined so that the protrusion 472A of the upper support member 472 is inserted into the fitting hole 510.

(3) The valve body 412 is inserted into the check valve mounting part 486, and the valve seat 508 is mounted on the upper part of the check valve mounting part 486.

(4) Finally, the vent valve 110 is twisted into the check valve installation part 486 of the upper support member 472 to fix the vent valve 110 to the check valve installation part 486. At this time, it is possible to hold the cover 474 of the fixed pressure relief device 400 with one hand, and hold the vent valve 110 with the other hand to twist the vent valve 110 into the check valve mounting portion 486. Since the upper support member 472 and the outer cover 474 are installed so as not to rotate relative to each other, the upper support member 472 does not rotate when the vent valve 110 is twisted into the check valve mounting portion 486 as long as the outer cover 474 is held and fixed by hand.

(5) Insert the insertion tube portion 482 of the pressure relief device 400 after the vent valve 110 is installed into the pressure relief device attachment portion 56 of the tube trap 24 to attach the pressure relief device 400 to the tube trap 24.

In addition, in the pressure relief device 400 of this embodiment, the lower support member 470 is relatively rotatable with respect to the outer cover 474. However, assuming that the same protrusion 472A as the upper support member 472 is formed on the outer periphery of the lower support member 470, and the protrusion 472A is inserted into the fitting hole 510 of the outer cover 474 so that the lower support member 470 and the outer cover 474 cannot rotate relative to each other, The following matters must be paid attention to when assembling the pressure relief device 400.

Since the first half-member 474A and the second half-member 474B are molded products, the positions of the upper fitting hole 510 and the lower fitting hole 510 are fixed. That is, the positional relationship between the upper fitting hole 510 and the lower fitting hole 510 in the circumferential direction is fixed.

Therefore, when attaching the lower support member 470 and the upper support member 472 to the elastic expansion and contraction body 468, it is necessary to match the positional relationship of the two fitting holes 510 formed in the first half member 474A and the second half member 474B. The positional relationship (circumferential angle) of the protrusion 472A of the lower support member 470 and the protrusion 472A of the upper support member 472 in the circumferential direction is determined.

Here, the circumferential positional relationship between the protrusion 472A of the lower support member 470 and the protrusion 472A of the upper support member 472 attached to the elastic expansion and contraction body 468 is relative to that formed on the first and second half members 474A and 474B. If the positional relationship between the upper fitting hole 510 and the lower fitting hole 510 in the circumferential direction is not consistent, the lower support member 470 and the upper support member 472 must be twisted in the circumferential direction to match the positional relationship before the protrusion 472A is inserted into the fitting hole 510, respectively.

Thereby, the outer cover 474 can be installed, but when the elastic expansion and contraction body 468 is fixed inside the outer cover 474 in a twisted state, the elastic expansion and contraction body 468 will remain unnecessarily deformed (distorted), and elastic expansion will occur. The shrinking body 468 may become difficult to expand and contract.

On the other hand, in the pressure relief device 400 of this embodiment, since the protrusion 472A inserted into the fitting hole 510 is not formed in the lower support member 470, it is only necessary to align the protrusion 472A of the upper support member 472 with the first pair. The upper fitting hole 510 formed by the half member 474A and the second half member 474B is combined with the first half member 474A and the second half member 474B, so that the elastic expansion and contraction body 468 can be fixed to the outer cover without torsion. 474 inside. Thereby, the installation of the outer cover 474 becomes easy, and the expansion and contraction performance of the elastic expansion and contraction body 468 can be ensured.

[Other embodiments]

As mentioned above, although one embodiment of the present disclosure has been described, the present disclosure is not limited to the above description. In addition to the above description, of course, various modifications can be made and implemented without departing from the spirit of the present disclosure.

In the above embodiment, the flow table 16 is equivalent to the first water appliance of this disclosure, and the dishwasher 18 is equivalent to the second water appliance of this disclosure. However, as long as the first water appliance and the second water appliance can drain water, The type is not particularly limited. As the water equipment, for example, a washbasin, a washing machine, a bathtub, a washing area, etc. may be mentioned, but other items may also be used.

In the drain pipe structure 10 of the above-mentioned embodiment, although the waste food processing machine 20 is provided in the flow table 16, it is not necessary to provide the waste food processing machine 20.

In the above embodiment, although the vent valve 110 is used as an example of the vent, the present disclosure is not limited to this, as long as it can introduce external air to suppress the negative pressure when the pipe on the downstream side of the pipe trap 24 becomes negative. For negative pressure, other configurations can also be used to replace the vent valve. For example, you can also The vent valve 110 is replaced by a configuration in which one end of the pipe is connected to the pressure relief device 66 or the pressure relief device 400 and the other end of the pipe is connected to the drain standpipe 34 or the like. In this case, the air inside the drain standpipe 34 can be introduced into the pipe on the downstream side of the pipe trap 24 to suppress the negative pressure in the pipe.

Although the temporary storage part 204 is formed in the cylindrical shape whose upper-lower direction is the axial center direction, the shape is not limited to this, It may be any shape, such as a rectangular parallelepiped. In addition, although the axis X1 of the inlet 204A is eccentric with respect to the axis Z of the temporary storage portion 204, it may be a non-eccentric configuration. Although the axis X2 of the outlet 204B is not eccentric with respect to the axis Z of the temporary storage portion 204, it may be an eccentric configuration.

Although the pressure relieving device 66 and the pressure relieving device 400 of the above embodiment are provided with a lower support member 70, an upper support member 72, an outer cover 74, a lower support member 470, an upper support member 472, and an outer cover 474, as long as they are viewed It can be set as needed, or not set.

Although in the pressure relief device 400 of the above-mentioned embodiment, the groove 474Af is provided on the inner peripheral surface of the outer cover 474, the groove 474Af may or may not be provided as long as the groove 474Af is provided as necessary.

Although the pressure relief device 400 of the above-mentioned embodiment is provided with the protrusion 472A and the fitting hole 510 so that the outer cover 474 and the upper support member 472 do not rotate relative to each other, they may or may not be provided as long as they are provided as needed.

Although in the elastic expansion and contraction body 468 of the pressure relief device 400 of the above-mentioned embodiment, the interval A<diameter B is set, as long as the interval A<diameter B is set as necessary, the interval A≧diameter B may be adopted.

Although the upper part 492 is provided in the elastic expansion and contraction body 468 of the pressure relief device 400 of the above-mentioned embodiment, the upper part 492 may be provided as required, and it may not be provided.

Although the pressure relief device 400 of the above-mentioned embodiment is provided with a float valve composed of the check valve mounting portion 86, the valve body 412, and the valve seat 508, it is not necessary to provide these as long as necessary. set up.

65: Pressure adjustment device

66: Pressure Relief Device

68: Elastic expansion and contraction body

68A: Expansion part

68B: Base

68C: Installation Department

68D: Ribs

70: Lower support member

72: Upper support member

74: outer cover

78: ring groove

80: Through hole

82: Insert the tube

84: Through hole

86: Check valve installation department

86A: Male thread

90: check valve

92: body

92A: Female thread

92B: Male thread

94: valve body

96: Lid

96A: Female thread

98: Partition Wall

100: Valve body support

102: Through hole

104: Valve seat

106: valve hole

110: Vent valve

Claims (9)

A pressure adjusting device, which has: The expandable cylinder is made of elastic material and has two openings; and The vent is connected to the opening on one side of the cylinder and ventilates between the inside of the cylinder and the outside air. For example, the pressure adjustment device of item 1 in the scope of patent application has: The outlet cover is installed on the cylinder to cover the opening on one side, and the vent is installed, and it is provided with a first communication hole that allows the cylinder to communicate with the vent; The inlet cover is installed on the cylinder to cover the opening on the other side, and is provided with a second communication hole that allows the drain pipe to communicate with the cylinder; and The body cover is installed on the inlet cover and the outlet cover, and surrounds the cylinder. For example, the pressure adjusting device of the second item of the scope of patent application, wherein the body cover supports the inlet cover and the outlet cover from a direction intersecting the axial direction. For example, the pressure adjusting device of item 3 of the scope of patent application, wherein the inner peripheral surface of the main body cover is provided with a supporting part that is engaged with the inlet cover and the outlet cover to support the inlet cover and the outlet cover. For example, the pressure adjusting device of any one of items 2 to 4 in the scope of patent application, wherein the inlet cover and the body cover are relatively rotatable; The outlet cover and the main body cover are prevented from rotating relative to each other by a fixing part that prevents relative rotation. For example, the pressure adjusting device of the first item of the scope of patent application, wherein a first space communicating with the opening on one side and the opening on the other side is provided inside the cylinder, and will communicate with the first space And a plurality of second spaces extending in the radial direction and the axial direction of the cylinder; Viewed from the direction crossing the axis of the cylinder, the maximum width of the first space is set to be larger than the maximum width of the second space. For example, the pressure adjusting device of the first item of the scope of patent application, wherein the cylinder system has a base that extends in the radial direction and is formed with the opening, and is erected on the base and extends toward the axial and radial directions of the cylinder To partition the wall of the second space; The base part and at least the part on the axis side of the wall part are connected through an inclined surface inclined with respect to the base part. For example, the pressure adjustment device of the first item of the scope of patent application, wherein a float valve is arranged between the cylinder and the vent portion arranged on the upper side of the cylinder, and the structure of the float valve includes a valve seat and The valve body is arranged separately below the valve seat and floats on the water. A drainage pipe structure with: The pipe catcher is equipped with an inflow part that causes the inflowing drainage to flow downward, and a first lower bending pipe part that is arranged below the inflow part and that bends downward from the upper side of the vertical direction to the horizontal direction. The first upper curved pipe portion, which is on the downstream side of the drainage direction of the first lower curved pipe portion and will bend upwards from the horizontal direction to the vertical direction, is provided on the downstream side of the drainage direction of the first upper curved pipe portion and The second upper curved pipe portion that is bent upward from the lower side of the vertical direction toward the horizontal direction, and the second upper curved pipe portion is provided on the downstream side of the drainage direction of the second upper curved pipe portion, and downward from the horizontal direction to the lower side of the vertical direction The curved second lower bend pipe section; and For example, the pressure adjustment device of the first item of the scope of patent application is installed on the upper part of the second lower bending pipe.

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